Calender rack



F. M. MORTON Jan. 10, 1928.

CALENDER RACK 'File d Jan.10. 1927 anomwqo Patented Jan. It), 192%.

UNITED. STATES FRANK M(IIORTON, OF lI-IENIX CITY, ALABAMA.

CALENDER RACK.

Application filed January 10, 1927. Serial No. 160,292.

The invention relates to calender racks for holding lap pins normally in proper position, but for releasing and permitting upward movement of the pin in case excessive pressure is exerted by the latter. Calender racks of this general nature have oi course heretofore been used, both with slidable and pivoted heads carrying lap pin bearings. It is the object of my invention however to provide a new and improved form of calender rack which possesses a number of novel and advantageous features of construction.

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawing. I

Fig. 1 is a vertical sectional view partly in elevation of a calender rack constructed in accordance with the present invention, the device being disposed for holding the lap pin in its normal position.

Fig. 2 is a view similar to Fig. 1 but illustrating the manner in which the device permits upward shifting of the lap pin under excessive pressure.

Fig. 3 is an edge view as indicated by the arrow A. of Fig. 1.

Big. 4- is a detail sectional view on the plane of line 4 1 of Fig. 1.

The drawings .bove briefly described, illustrate the preferred form of construction and while thisconstruction will be hereinafter specifically described, it is to be understood at the outset that the disclosure is illustrative rather than limiting, in most respects.

The numeral 5 designates a ertical rack having the usual teeth 6. Formed integrally with the upper end of this rack, a sul stantially semi-cylindrical hood. 7 which. opens laterally and is provided at its upper portion with. an integral, outwardly PlO-" j' ecting tubular neck 8, an opening 9 being formed from the interior of the neck to the interior of the hood.

A hood-like head 10 is received between the side members 11 of the hood 7 and is provided with a curved peripheral wall 12 which extends across the opening 9, the side members 13 of said head being in or sub stantially in contact with the side members '11 of the hood 7. It will be observed from Fig. 1, that the interiors of the hood 7 and head .0 are in communication with each other, and that said interiors receive a main, lap pin bearing roller M whose periphery is downwardly exposed at one edge of the rack 5. A single pin 15 passes through the side members 11 and 13 and through the roller 1 1, to pivotally connect the head 10 with the hood 7 and to rotatably mount the roller 14-.

At the lower end of the peripheral wall 12, a second lap pin bearing roller 16 is rotatably mounted between the side members 13, and this roller maintains the lap pin 17 in contact with the roller 14, at the same time, assisting in forming an adequate roller bearing for said pin. Preferably, the side members 18 have downwardly extended portions 18 which project below the roller 16 and constitute noses for holding the lap pin 17 in engagement with the rollers, whenever the head 10 turns about its pivot 15, under excessive pressure on the lap pin.

The head 10 is normally held against turning about the pivot 15, by a spring-pressed shoe 19 disposed in the opening 9 and normally abu-ttinga shoulder 20 on the wall 12, said shoulder being preferably formed by one side wall of a groove. The shoe 19 is by preference in the form of a roller and it is engaged by a grooved. disk 21 within the neck 8. A coiled compression spring 22, within this neck, contacts at one end with the disk 21 and at its other end engages another disk 23. A screw 24 having an operat ing handle 25, is threaded through a closure 26 for the outer end of the neck 8 and contacts with the disk 23, thus permitting the proper strength to be normally stored in the spring 22, for the purpose of holding the shoe 19 engaged with the shoulder 20. However, when the lap pin 17 forces upwardly upon the rollers 1 .1- and 16 with excessive pressure, the strength of the spring 22 is overcome and the shoe 19 then disengages from the shoulder 20, permitting the head 10 to turn as shown in Fig. 2. During this turning movement, the lap pin. 17 travels along the periphery of the roller 14', due to the fact that head 10 is pivotally mounted co-axially with this roller. During this turning of the head 10, its arcuate peripheral wall 12 forms a track along which the shoe 19 travels, and said wall is provided with means for impeding the shoe, thus creating a braking action to control the swinging of the head 10 and prevent it from. immediately flying upwardly to maximum extent upon release fit of the shoe 19 from the shoulder 20. In the present showing, this impeding means is formed by circumferentially spaced transverse grooves 97 in the wall sides of said grooves terminoshoulders which are successively engaged by the shoe.

When no more than normal upward pressure is exerted upon the rollers 19: and 16 by the lap pin 17, the parts will remain in the relation shown in Figs. 1 and 2, but when the upward pressure is excessive, the spring 22 is overcome, permittingdisengagcmeut of the shoe 19 from the shoulder 20 and allowing turning of the head 10 about its pivot 15. During this turning. a braking action is created on the nead 1 0 hy the co-operation of the shoe 19 with the grooves or the like 27. and as such turning es place, the lap pin 1'? remains in en- ;em'ent with the rollers fly-. and 15, merely traveling along the periphery of the former, until possibly the maximum upward position of the head is reached.

To reset the device tron'i a released position, it is simply necessary to loosen the screw 2% by means of the handle whereupon head 10 may be easily swung to its normal position, in which. position it will be held by the shoe l9 and shoulder 20, when the screw is again tigl'itened. I

The detailsl'ierein disclosed are advantageous and may well be followed. However, in this connection, attention is again invited to the tact that within the scope of the invention as claimed, numerous variations may be made.

I claim:

1. A device of the class described comprising a rack, a lap pin bearing roller mounted. thereon, a head pivoted to the rack coaxially with said roll r and having means laterally oli'set from the roller for holding a lap pin against said roller, and yieldable means for holding the head against pivotal mm'ement until the lap pin exerts excessive pr sure against said lap pin holding means thereof, said yieldah le Inez-ins then permitti pivotal i'noviunent o l the head and travl of the lap pin around the periphery o i said. rol lei.

2. A (leviceoilthe classdescrihed comprising a rack, a lap pin bearing roller mounted thereon, a head pivoted to said rack co-axially with said roller, a second lap pin hearing roller spaced laterally from the lower portion or the first named roller and mounted on said head, and yieldable means for holding said head against pivotal movement until the lap pin forces with excessive pressure against therollers, said means yielding under such excessive pressure, permitting; turning of the head and travel of thelap pin around the peripl'iery oi": the first named roller. I

3, A structure as s 'ieeilied in Claim 2;

said head having a nose projecting downwardly beyond the second roller to hold the lap pin engaged with the rollers as the head turns about its pivot;

l. A device of the class described comprising a rack, a lap pin bearing roller, a head provided with means for holding a lap pin against said roller, a single pin pivoting said head to the rack and rotatably connecting the roller with said rack, and yieldable means for holding the head against pivotal movement until the lap pin torces with excessive pressure against the lap pin holding means of said head.

5. A device or the class described con1- prising a rack, a head pivoted to said rack on a transverse axis and having a lap pin bearing laterally otl'set from its pivot, said head being provided with a track substantially concentric with its pivot and termed with a shoulder, and a yieldable shoe mounted on the rack and engaging said shoulder; the shoe and shoulder serving to hold the head against pivotal movement until excessive pressure is exerted against said hearing by the lap pin, whereupon the shoe disengaees from the shoulder and moves along said track, said track being provided with longitudinally spaced impediments succe aively en 'aged by the shoe to create a braking action controlling the pivotal movement of the head. i

(5. A device oi the class described comprising a rack having a laterally opening rigid hood at its upper end, a tubularneel: projecting rigidly outwardly from said hood and an opening from the interior of the neck to the interior of the hood; a hood-like head between the side members of the hood and having a curved peripheral wall extending across the aforesaid opening, the interiors of the hood and head being in communication with each other, a lap pin bearinp roller in. said interiors, a. pin passing through the side members of the hood and head and through the roller to 1ivotally connect said hood and head and rotatably mount the roller, the aforesaid curved. peripheralwall being substantially coiurentrio with said pin, said head having means laterally oil set from said. roller tor hohliu c' a lap pin agaii'ist the same, a shoe in the above-named opening engaging the aforesaid curved peripheral wall, the latter having a shoulder normally abutting said shoe, and spring means mounted in the above named tubular neck for holding the shoe engaged with said shoulder until the lap pin forces with excessive pressure against the lap pin holding portion of the head.

7. A device of the class described comprisinc; a rack having a laterally opening rigid hood at its upper end, a tubular neck pro-- jecting rigidly outwardly from said hood and an opening from the interior of the neck ill) to the interior of the hood; a hood-like head between the side members of the hood and having a curved peripheral wall extending across the aforesaid opening, the interiors of the hood and head being in communication with each other, a lap pin bearing roller in said interiors, apin passing through the side members of the hood and head and through the roller to pivotally connect said hood and head and rotatably mount the roller, the aforesaid curved peripheral wall being sub,- stantially concentric with said pin, a second lap pin bearing roller mounted between the side members of the head and laterally ottset from the first named roller for holding a lap pin against the same, a shoe in the above named opening engaging the aforesaid with excessive pressure against said second lap pin bearing roller.

8. A structure as specified in claim 7 said side members of said head having portions projecting downwardly beyond said second roller to engage the lap pin and hold it against movement from the rollers as the head turns about its pivot pin.

In testimony whereof I have hereunto affixed my signature.

FRANK M. MORTON. 

